Will an Apple store allow me to exchange a 64gb MacBook Air for a 128gn MacBook air without a receipt? I picked one up from someone who received it as a wedding gift and they do not have a receipt. I guess the receipt was emailed to the person who purchased it and they can't find it. The item is unopened, and I'd rather have the larger SSD. Does Apple only ask for an email? I would think they could find the receipt by looking up a name or phone number or some other way, even if the email was forgotten or incorrect.